Sorry to ressurect an old post, but I thought I'd take the time to give an update on this project.
There is still a lot to do, however the good news is that I have been working on what I call DIB, that is Dynamic Interactive Buildings, which incorporate things like breaking glass windows, door that can be shot/blown/opened normally, furniture and other stuff like sittable chairs that can be placed dynamically in the building and be interacted with. E.g. objects that can be destroyed such as bottles etc.
For more info have a look at the DIB section at
DC3D Official Forum.
There is a heap off stuff planned such as placeable objects etc.